Working with 3D Models in Design & Construction Panel Discussion 1

Topics for Discussion Status of 3D modeling at MoDOT Discuss what 3D model outputs are useful in construction Describe applications of 3D models in construction 2

MoDOT’s Current Digital Plans Delivery Electronically Signed & Sealed Vector PDF’s 3 Source: MoDOT and Bentley Systems, Inc. PowerGeopak

Current creation of the 3D Design Model Today’s Level of Detail Existing terrain collected using helicopter LiDAR (accuracy of data is certified at +/- 0.3ft). Design model prepared for projects with cross sections and earthwork pay items. Design model prepared for linear corridors and major intersections only. Entrances and bridges are NOT modeled at this time. Purpose for the model is to develop plan sheets 4

Digital Engineering Data Delivery -TODAY Provided Pre-Bid for Information Only 5 Type of ProjectDigital Data Provided Projects with significant amount of cross-sections Survey control points, available alignments and profiles, existing DTM, PFG surface, and when possible a subgrade surface.

Future of 3D Design Model 6 Source: Parsons Brinckerhoff & ARA for FHWA Type Density Format Timing Authorized Use For the Purpose of Automated Machine Guidance Grading Surface Pavement Surface Base Surface

Future of 3D Data Delivery Type of ProjectDigital Data ProvidedFormat Bridge and/or Resurfacing Survey control points, available alignments and profiles LandXML, and native PowerGeopak Reconstruction Widening Guardrail Survey control points, existing DTM, available alignments and profiles, 3D string-lines, all available proposed surfaces, such as subgrade, aggregate, and pavement of the reconstruction LandXML and native PowerGeopak for cogo & surfaces DGN for 3D line-strings and plan graphics Expansion/ New Construction Paving Intersection Improvements Survey control points, existing DTM, available alignments and profiles, 3D string-lines, all available proposed surfaces, such as subgrade, aggregate, and pavement of all new construction LandXML, and native PowerGeopak for cogo & surfaces DGN for 3D line-strings and plan graphics Provided Pre-Bid for Information Only 7

CONTRACTOR NEEDS TO SUPPORT 3D MODELS FOR AMG AND STRINGLESS PAVING THE DIFFERENT USES OF ELECTRONIC FILES BID DOCUMENTS PLAN VERIFICATION AMG CONTROL 3D MODELING

Contractor Use of 3D Models 9 Source: AGTEK Bid Documents

Contractor Use of 3D Models 10 Source: Sundt Construction and AGTEK Plan Verification

Contractor Use of 3D Models 11 Source: Topcon, Trimble, GOMACO, Leica, MoDOT AMG Control Excavation Trimming/Milling Horizontal Layouts Concrete & Asphalt Paving Grading and Base AMG Construction Management

How Contractors Use 3D Models 12 Source: Parsons Brinckerhoff and ARA for FHWA 3D Model Analyze Data Meet with Project Managers Supplement/ Recreate Models Review Means & Methods Review & Back-check Models Create Grading & Utility Models Share models with Engineering and Subcontractors Migrate Data to the Field

13 Source: MoDOT Any Questions? Thank You